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Abstract

The presence of fiber attenuation and chromatic dispersion is one
of the major design aspects of fiber-optic communication systems when
one addresses high-rate and long-distance digital data
transmission. Conventional digital communication systems implement
a modulation technique that generates light pulses at the fiber input
end and tries to detect them at the fiber output end. Here an
advanced modulation transmission system is developed based on knowledge
of the exact dispersion parameters of the fiber and the principles of
space–time mathematical analogy. The information encodes the phase
of the input light beam (a continuous laser beam). This phase
is designed such that, when the signal is transmitted through a fiber
with a given chromatic dispersion, high peak pulses emerge at the
output, which follows a desired bit pattern. Thus the continuous
input energy is concentrated into short time intervals in which the
information needs to be represented at the output. The proposed
method provides a high rate–distance product even for fibers
with high dispersion parameters, high power at the output, and also
unique protection properties. Theoretical analysis of the proposed
method, computer simulations, and some design aspects are
given.

References

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